User-equipment coordination set beam sweeping

This document describes techniques and apparatuses for user-equipment coordination set (UECS) beam sweeping. In aspects, a user equipment (UE) receives an indication to coordinate beam sweeping with a UECS. The UE directs each UE in the UECS to perform a beam-training procedure by receiving a set of downlink beam transmissions, and forwards beam report information to a base station. In implementations, the UE receives an indication of one or more beam identities and one or more assigned time slots, and directs at least two UEs in the UECS to use specific beams indicated by the beam identities at specific time slots indicated by the assigned time slots, such as by transmitting a respective beam identity and a respective time slot to each UE of the at least two UEs.